29 static void vbva_buffer_place_data_at(struct vbva_buf_ctx *vbva_ctx,  in vbva_buffer_place_data_at()  argument
32 	struct vbva_buffer *vbva = vbva_ctx->vbva;  in vbva_buffer_place_data_at()
61 bool vbva_write(struct vbva_buf_ctx *vbva_ctx, struct gen_pool *ctx,  in vbva_write()  argument
68 	vbva = vbva_ctx->vbva;  in vbva_write()
69 	record = vbva_ctx->record;  in vbva_write()
71 	if (!vbva || vbva_ctx->buffer_overflow ||  in vbva_write()
87 				vbva_ctx->buffer_overflow = true;  in vbva_write()
93 		vbva_buffer_place_data_at(vbva_ctx, p, chunk,  in vbva_write()
107 static bool vbva_inform_host(struct vbva_buf_ctx *vbva_ctx,  in vbva_inform_host()  argument
118 	p->base.offset = vbva_ctx->buffer_offset;  in vbva_inform_host()
137 bool vbva_enable(struct vbva_buf_ctx *vbva_ctx, struct gen_pool *ctx,  in vbva_enable()  argument
144 	vbva->data_len = vbva_ctx->buffer_length - sizeof(struct vbva_buffer);  in vbva_enable()
145 	vbva_ctx->vbva = vbva;  in vbva_enable()
147 	ret = vbva_inform_host(vbva_ctx, ctx, screen, true);  in vbva_enable()
149 		vbva_disable(vbva_ctx, ctx, screen);  in vbva_enable()
154 void vbva_disable(struct vbva_buf_ctx *vbva_ctx, struct gen_pool *ctx,  in vbva_disable()  argument
157 	vbva_ctx->buffer_overflow = false;  in vbva_disable()
158 	vbva_ctx->record = NULL;  in vbva_disable()
159 	vbva_ctx->vbva = NULL;  in vbva_disable()
161 	vbva_inform_host(vbva_ctx, ctx, screen, false);  in vbva_disable()
164 bool vbva_buffer_begin_update(struct vbva_buf_ctx *vbva_ctx,  in vbva_buffer_begin_update()  argument
170 	if (!vbva_ctx->vbva ||  in vbva_buffer_begin_update()
171 	    !(vbva_ctx->vbva->host_flags.host_events & VBVA_F_MODE_ENABLED))  in vbva_buffer_begin_update()
174 	WARN_ON(vbva_ctx->buffer_overflow || vbva_ctx->record);  in vbva_buffer_begin_update()
176 	next = (vbva_ctx->vbva->record_free_index + 1) % VBVA_MAX_RECORDS;  in vbva_buffer_begin_update()
179 	if (next == vbva_ctx->vbva->record_first_index)  in vbva_buffer_begin_update()
183 	if (next == vbva_ctx->vbva->record_first_index)  in vbva_buffer_begin_update()
186 	record = &vbva_ctx->vbva->records[vbva_ctx->vbva->record_free_index];  in vbva_buffer_begin_update()
188 	vbva_ctx->vbva->record_free_index = next;  in vbva_buffer_begin_update()
190 	vbva_ctx->record = record;  in vbva_buffer_begin_update()
195 void vbva_buffer_end_update(struct vbva_buf_ctx *vbva_ctx)  in vbva_buffer_end_update()  argument
197 	struct vbva_record *record = vbva_ctx->record;  in vbva_buffer_end_update()
199 	WARN_ON(!vbva_ctx->vbva || !record ||  in vbva_buffer_end_update()
205 	vbva_ctx->buffer_overflow = false;  in vbva_buffer_end_update()
206 	vbva_ctx->record = NULL;  in vbva_buffer_end_update()
209 void vbva_setup_buffer_context(struct vbva_buf_ctx *vbva_ctx,  in vbva_setup_buffer_context()  argument
212 	vbva_ctx->buffer_offset = buffer_offset;  in vbva_setup_buffer_context()
213 	vbva_ctx->buffer_length = buffer_length;  in vbva_setup_buffer_context()